symplectic leaves

What is the symplectic leaves of sphere($S^n$) of dimension $n$ when $n>2$

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sympltic leave depends on Poisson structure, which is not specified in the question (can be many e.g. zero Poisson structure for which each point is s.l.), so the question is non-clear for me. – Alexander Chervov Apr 15 2012 at 18:29
standard fact - S^n cannot be symplectic manifold – Alexander Chervov Apr 15 2012 at 18:31
why $S^n$ cannot be symplectic manifold – Hassan Jolany May 12 at 17:15